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Nezavi [6.7K]
3 years ago
7

Tell whether the ratios form a proportion. 1/3, 7/21

Mathematics
2 answers:
Mandarinka [93]3 years ago
7 0

Answer:

i would say yes

my work :

so i did 21 times 1 which is 21.

Tben i did 3 times 7 which is also 21.

So in conclusion i would say yes but i can't guarantee that

Anuta_ua [19.1K]3 years ago
6 0

Answer:

Yes

Step-by-step explanation:

7/21 -> Divide both sides by 7 which gets you 1/3

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Please refer to the image.
Citrus2011 [14]

Answer:2.7

Step-by-step explanation:multiply 3 x 1.8 then divide by 2

8 0
3 years ago
Read 2 more answers
Solution to m^2- 36=0
alex41 [277]

Answer:

m=(-6,6)

Step-by-step explanation:

m^2 -36 = 0

Reorder the terms:

-36 + m^2 = 0

Solving for variable 'm'.

 Add '36' to each side of the equation.

-36 + 36 + m^2 = 0 + 36

Combine like terms: -36 + 36 = 0

0 + m^2 = 0 + 36

m^2 = 0 + 36

Combine like terms: 0 + 36 = 36

m^2 = 36

Simplifying

m^2 = 36

Take the square root of each side:

√m^2=+/-√36

m=(+/-)6

m = {-6, 6}

4 0
3 years ago
Identify the slope and y-intercept of the<br> line!
marta [7]

Slope of the line = \frac{1}{2}.

y-intercept of the line = -7.

Solution:

General form of equation of a line:

y = mx + c

where m is the slope and c is the y-intercept of the line.

Equation of a line:

$y=\frac{1}{2} x-7

To compare this with general equation.

$m=\frac{1}{2}

c=-7

Slope of the line = \frac{1}{2}.

y-intercept of the line = -7.

5 0
3 years ago
What is the equation in vertex form of the quadratic function with a vertex at (-1, -4) that goes through (1, 8)?
cestrela7 [59]

Answer:

y = 3(x+1)^2 - 4

Step-by-step explanation:The general form of the equation of a quadratic function whose vertex is (h,k) and whose leading coefficient is a is:

y - k = a(x-h)^2, or

y      = a(x-h)^2 - k

Substituting the coefficients of the vertex (-1, -4), we get:

y      = a(x + 1)^2 - 4

Substituting the coordinates of the given point, (1,8), we get:

8      = a(1+1)^2 - 4, which simplifies to:

8      = a(2)^2 - 4, or

8  = 4a - 4.  Then 4a = 12, and a = 3.

Thus, the desired equation is y = 3(x+1)^2 - 4 (answer j).


5 0
3 years ago
If 8 family members choose to play "Secret Santa," how many different ways can the names be paired?
viktelen [127]

Answer:

300,000,000 or three hundred million

Step-by-step explanation:

3 0
2 years ago
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